Jo Cox, a member of the British parliament from the center-left Labour Party, died an hour after getting shot and stabbed near her constituency office Thursday in Birstall.
The attack took place around 1 p.m. local time during a campaign event in Cox’s constituency. West Yorkshire police said a 52-year-old man had been arrested.
“I got a call from a colleague who was with her and I came straight over,” a member of Cox’s team said, according to BBC. “There was an ambulance there. She has been injured but I don’t know how or what.”
Police said they are currently not looking for any further suspects.
The assassination took place just over a week before the United Kingdom referendum on whether or not the country should stay in the European Union. Cox is the chair of “Friends of Syria” and a supporter for the “Remain” campaign.
Witness reports say the alleged attacker shouted “Britain First” before carrying out the attack.
Prime Minister David Cameron tweeted out his support for Cox and her family.
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